P2P 架构下环型结构文件热备份系统设计

针对文件共享系统中的文件热备份问题，提出一种在 P2P 网络中利用节点间环型结构实现共享文件备份的方法。围绕环型结构文件热备份设计，在实验系统中同时解决了网络节点加入与退出、节点状态监控、节点连接信息刷新、各节点中共享文件协同检索，以及各节点间实时通信等技术问题。充分利用 P2P 网络结构的技术特点，提高文件共享系统的可用性，同时证明 P2P 网络结构下的文件资源共享系统具有扩展方便、负载变化对系统影响较小等特点。

The Design of Hot Backup System of Circular Structure File Based on P2P

Aiming at the problem of hot backup of files in file sharing system，we propose a method of backup of shared files in P2P network by using the ring structure formed between nodes. Based on the design of hot backup of circular structure files，the technical problems such as the joining and exiting of network nodes，the monitoring of node status，the refreshing of node connection information，the collaborative retrieval of shared files among nodes and the real-time communication among nodes are solved in the experimental system. The technical characteristics of P2P network structure is fully used to improve the availability of file sharing system. At the same time，it is proved that the file resource sharing system based on P2P network structure has the characteristics of convenient expansion and less impact of load change on the system.